[Альтернативные] sources of energy were being sought after.

Alternate Alternative

[Чтобы расшифровывать] cave paintings or rock carvings requires a commitment to a theory of the cave dweller’s world-view.

Hint: A form in –ing is needed!

Interpreting

Algebra traditionally designates variables as X,Y,Z and [постоянные, константы] as A,B,C.

constants

As Grandpa got older, he began to get some strange [прихоти] .

notions whims fancies

By 300 BC, Greece had already [основала] colonies in both mainland Italy and Sicily.

established founded

Despite the rains, the festival [завершился] with its traditional fireworks display.

Hint: Find a synonym for “ended” and “finished”!

concluded ended finished

Double rainbows were a common [событием] that rain-filled autumn.

Hint: The target word has an odd singular form and an irregular plural!

phenomenon occurrence

Info: One phenomenon, two phenomena.

He led the expedition to find the [источник] of the Nile.

source wellsprings origin origins

I just couldn’t [себе представить] how we were going to get everything ready on time.

imagine understand

I think that that injury of yours is going to require [медицинского] attention.

Hint: Find an adjective!

medical

In the [последнем] act, the heroes all die.

final last

It was [очевидно] to all of us that he was lying.

evident obvious manifest clear

It was clearly time to [анализировать] the results.

analyze analyse

Info: The spelling in “-se” is primarily BrE.

Our house was last [оценен] two years ago.

assessed reassessed re-assessed

Reorganizing their filing system turned out to be a truly [трудным, сложным] task.

laborious arduous

The [район] had become increasingly arid.

region area district tract

The antidote must be [дано] within four hours of the snakebite.

Hint: Find a synonym for “given”!

administered given injected

The change in the vegitation [указывало на то] that we were getting close to a river or lake.

implied suggested hinted

The earthquake caused [значительный, существенный] damage to the region’s infrastructure.

considerable major important

The human [фактор] seemed to be the main cause of the crash.

factor element

The king decided to [соорудить, воздвигнуть] new fortifications at key points in the valley.

construct raise build

There were no business-class seats left, so they flew [экономклассом, туристическим классом] .

Hint: Find a synonym for “tourist class”!

economy economy class economy-class tourist class tourist-class

This particular [документальный фильм] turned out to be a fake.

documentary

We finally managed to [получить, раздобыть] a copy of the building plans.

obtain procure acquire

We wanted to know roughly how much work this [потребует] .

involve require call for demand